Although industry and trade were Nubia 's primary sources of wealth the advanced agricultural system was a vital component. The Napatan-Meroitic Kingdom practiced "seasonal shifting agriculture throughout the whole region," and "wide spread animal husbandry" along the Blue Nile . Irrigation and an animal powered water wheel increased productivity, creating a substantial surplus.8

Although the agrarian society helped produce the great wealth, trade brought in the greatest revenue. Urban centers expanded and multiplied, acting as markets between the African hinterland, Egypt , the Mediterranean, and regional trading communities in Nubia .9 Nubian ports on the Red Sea also traded with Arabia , India and China . A middle class of skilled craftsmen, traders, metal workers, weavers, architects, leatherworkers, boatmen, scribes, minor officials, and religious figurers developed.10 Nubia was actually one of the main gold producing nations of the ancient world.11

Under King Ergamenes Meroe became, according to the well-known Harvard classicist Frank Snowden, a Nubian Alexandria.12 Perhaps the foremost expert on Nubia , Professor William Adams, concurred: "Ptolemaic Egypt and Meroitic Kush were provincial expressions of a world civilization."13

Frank Snowden noted: "The renaissance of temple building under Ptolemaic and Roman Egypt was paralleled by Nubia ."14

As quoted above Meroe had, "palaces, audience chambers, stores, and domestic quarters for the palace staff," a bath which, "consisted of a large brick-lined tank with water channels leading into it from a nearby well."15

P.L. Shinnie believes that Meroitic pottery ranks among the finest in the ancient world.16

Frank Snowden agreed, writing that, "Meroitic decorated pottery…surpassed anything made in Egypt at the time."17
Military

Napatan-Meroitc armies used bows, swords, spears, and leather body armor--some soldiers likely used metal armory.21 Nubians also utilized chariots, horses, and elephants--ancient tanks on the battlefield. Coins from ancient Rome commemorated the Nubian elephant units by depicting an elephant on one side and the head of a black man on the other.22

Meroe a Nubian Alexandria?
this way of thinking or saying it has change,for further info to this subject go to the thread.
when greek was a african language.this will be further explain.

I GUESS term could still be used,but in a different way.It was called a nubian alexandria because it was thought that nubia became hellenized,
but this was not the case.The culture was kushite and distict from greek egypt,but what they got from greek egypt and later,they made thier own.(nubianized it)